In this Feb. 18, 2011 photo, Representatives Claire Levy, left, D-Boulder and Mark Waller, R-Colorado Springs, goes over notes on their Marijuana DUI Bill in the House Chamber at the Capitol in Denveron, Colo. With medical marijuana use becoming more common in Colorado, lawmakers want to put a law in the books to charge people who smoke marijuana and drive with a DUI. (AP Photo/Ed Andrieski)
